Steam-boiler.



No. 676,3. Patented :une u, lam. J. B. Binnen.;

STEM!" BOILER.

(Application Abd Hay 2, 19Go.)

(No Model.) 2 Sheets-Sheet l.

y? i www@ No. 67'6,||3. Patented June ll, ISM.

J. B. BENDER.

STEAM BUILER.

(Application led Hay 2, 19Go.) (No Model.) 2 Sheets-Sheet 2.V

' UNITED STATES PATENT` OFFICE.

JOHN BARNERD BENDER, OF TOLEDO, OHIO. l

STEAM-BOILER.

1SP1361'.ll?IIC..@ION formingpart of Letters Patent No. 676,113, datedJune 1 1, 1901. Application filed May 2, 1900. Serial No. 15.229. (Nomodel.)

To tlf/ZZ whom it may concer-71,:

Beit known that I, JOHN BARNERD BENDER, residing at Evesham avenue,Toledo, in the county of Lucas and State of Ohio, have invented certainnew and useful Improvements in Straight-Tube Water-Tube Boilers; and Ido hereby declare the following to be a full, clear, and exactdescription of the invention, Such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to a new and useful improvement in water-tubeboilers.

The object of the present invention is to produce a boiler which Whileonly using fea-4 tures essential to its construction as a boiler shallbeas strong as though auxiliary strength'- ening devices were applied.

To accomplish this object, the invention consists in the constructionhereinafter pointed out.

In the annexed drawings, Figure 1 is a Vertical longitudinal section ofa water-tube boiler provided with the invention. Fig. 2 is an enlargedvertical longitudinal section of a portion of a water-leg and the endsof tubes therein. Fig. 3 is an end view of the end nut. Fig. 4 is atransverse section on line et 4, Fig. 2.

In the drawings the letter A indicates a steam dome or drum supportedupon waterlegs B B', the interior of the drum and legs communicating, asusual. The upper endsof the water-legs are `bolted to the bottom a ofthe drum A. At its lower end the back water-leg B rests on a cradle C,which bears upon rollers c, allowing forthe movement of the water-legdue to variations of temperature. At this lower end of the back waterlegB' may be placed a water-inlet or watersupply pipe D. At the bottom ofthe front water-leg B is placed the door-opening e for admission to thefire-box E, the box and opening being of any ordinary construction.

The water-tubes F pass under the drums A and connect the two water -legsB B. Each tube passes entirely through the waterlegs and is securelyheld in place by fastenings on the outside of the water-legs.

terY-tube F is composed of a cylindrical body portionf, which extendsentirely through the boiler from the outside of one water-leg to theoutside ofthe other and is held therein by fastening devices. Where thebody portion f passes through the inner face b of the was ter-legs, itis swelled, so as to have an enlargement f on one side and anenlargement f2 onthe other side of the inner face b of the water-leg. Atits outer end the body portion fis received and held by a thimble Gr.This thimble G is securely held in the opening in the outer face IJ' ofthe water-leg. If desired,the thimble may be provided with shoul= ders ggVl outside and inside of the face Z7', so

as to effectually prevent movement of the thimble in such face. On theinside the thimble G has outside the line of the face b a shoulder g2.The outer end of the body portion f of the water-tube F is turned downwith a head f3, which engages and snugly lits the interior shoulder g2of the thimble Gr. This engaging or retaining thimble G receives on itsouter end g3 a threaded nut H, which closes the end of the water-tube,the extreme end g4 of the thimble G being received into a recess 72, ofthis nut I-I. In that portion of the water-tube which is between the twofaces b b` of the water-leg there are made several elongated openingsf4, in the present instance two being shown opposite each other.

With a construction of boiler such as shown it will be seen that theboiler is only pro vided with those parts which are essential to itsoperativeness as a boiler. There are no stays or auxiliary supportingdevices either inside the boiler or between the two faces of thewater-legs. rendered possible by the peculiar construction andarrangement of the water-tubes. As the tubes are enlarged at the innerfaces of the Water-legs and are held in the outer faces by the thimbles,the tubes themselves are rmly attached to both faces of the Water-legsand act as braces not only between the two water-legs, but also betweenthe two Vfaces of each water-leg. Also with the construction indicatedthe water-tubes may be An absence of these stays is easily cleaned bothinside and out by removing the nut at one end for cleaning the in'-terior. l Having thus described my invention, what I claim is- 1. AWater-tube boiler provided with front and back water-legs, andWater-tubes connecting and passing through the Wate'rlegs,

said tubes being rmly attached to the inner ter-legs. and tubesconnecting the two legs, such ltubes being held by enlargements-at one'.face ofl a Water-leg and ,by nuts* at the other face.

3. The combination of the water-leg, B,

the tube, F, having the enlargements, f'fatlthe face, b, of theWater-leg and the thimble, G, between the tube, F, and the face, b', of

the water-leg.

4*In testimony whereof I affix my signature in presence of twoWitnesses.

JOHN BARNERD BENDER..

Witnesses:

E. W. GAGE", AH. K'UEHN.

